smith



Aug. 16, 1955 E. J. SMITH 2,715,242

DOOR STOP Filed Oct. 1, 1951 INVENTOR.

ERWIN J.SMITH United States Patent DOOR STOP Erwin J. Smith, Detroit, Mich., assignor to Precision Hardware, Inc., Detroit, Mich., a corporation of Michigan Application October 1, 1951, Serial No. 249,157

6 Claims. (Cl. 16-86) The present invention relates to a door stop and more particularly, to a door stop including a rigid supporting member having a longitudinally arched portion, preferably of partial dome shape, and a rubber bumper at least partly received below the arched portion and extending laterally therebeyond for contact with a door.

The door stop comprises a cast, stamped, forged or otherwise formed partly hollow member and a resilient bumper body adapted to be inserted within the partial dome of the member.

It is an object of the present invention to provide a door stop which is at once attractive in appearance, economical to produce, sturdy in use, and particularly in which the rubber bumper element cannot be removed from the door stop when the door stop is in operative position.

It is a further object of the present invention to provide a door stop including a resilient door engaging body which rests directly on the floor, thus permitting its use with doors of tempered glass or other type having very little clearance between the door and floor.

Other objects and features of the invention will become apparent as the description proceeds, especially when taken in conjunction with the accompanying drawing, wherein:

Figure 1 is a plan view of one embodiment of the door stop.

Figure 2 is a front elevational view of the door stop shown in Figure 1.

Figure 3 is a side elevational view of the door stop shown in Figure 1.

Figure 4 is a front elevational view of the door stop shown in Figure 1, having associated therewith a separate mounting plate for elevating the door stop.

Figure 5 is a plan view of the mounting plate employed in Figure 4.

Referring now to the door stop illustrated in Figures l-3, it comprises a rigid member which may be a bronze casting or otherwise formed body of metal, plastic, or other suitable material. The rigid member 10 is generally elongated and is provided adjacent its ends with cars 12 having screw receiving apertures 13 therein for mounting the member on a fiat supporting surface such as a fioor or a separate mounting member subsequently to be described. Intermediate the apertured cars 13, the member 10 is provided with a longitudinally arched portion 14, the arch preferably taking the form of a half-dome open completely at its bottom and at one thereof. The bottom surface of the member 10, as indicated at 16, is fiat and is adapted to engage a flat supporting surface such as a floor. The half-dome portion 14 is provided with an inwardly extending cont nuous flange 18 at the laterally open side thereof.

A rubber bumper 20 which in this instance is illustrated as a separate pre-snaped element, is provided and may be inserted into and removed from the half-dome portion 14 prior to mounting of the door stop on the floor or other supporting surface. For this purpose the 2,715,242 Patented Aug. 16, 1955 bumper 20 has its rear portion formed to fit snugly within the hollow half-dome portion 14. In addition, it is provided with a laterally extending portion 22 which extends beyond the laterally open side of the hollow half-dome portion 14. Adjacent the laterally extending end 22, the bumper 20 is provided with a continuous groove 24 which receives the inwardly extending flange 18.

As best seen in Figures 2 and 3, the rubber bumper body 20 is shaped to extend below the bottom flat surface 16 of the rigid member 10.

Door stops of the present type are capable of use in a wide variety of installations but one common use thereof is in institutions and schools. Any door stop designed for use in a school must be so designed that the rubber bumper body cannot be removed from the supporting structure when the device is installed. School children find an irresistible temptation to test the structural characteristics of a door stop by standing upon the projecting rubber portion thereof to see if it can in some manner he forced out of its structure. By providing the rubber bumper body 2% so that it normally extends a substantial distance below the flat bottom portion 16 of the rigid member 10, a structure is provided which when assembled and drawn down tightly against a fiat supporting surface substantially compresses the rubber and makes it impossible to remove the rubber bumper body by pressure applied to any laterally projecting portion thereof. This strong support for the projecting rubber bumper portion is of course rendered more effective by the inwardly projecting rib or flange 18 of the rigid member 10 which is received within the groove 24- provided in the rubber bumper body. Thus when the rigid member 10 and the rubber bumper body 20 are assembled as illustrated in Figures 1-3, and are thereafter drawn down tightly against a flat supporting surface so that the rubber is forced upwardly above the plane of the flat bottom surface 16 of the rigid member 10, a support is provided for the rubber bumper body which effectively prevents its separation from the metal supporting member.

In some cases, where a threshold or saddle is under the floor, it is desirable to elevate the rubber bumper body 20 to a position somewhat above the plane of the floor and for this purpose the present invention contemplates the provision of a separate supporting plate 30 having the configuration best illustrated in Figure 5. It will be observed that the supporting plate 30 includes laterally extending cars 32 having apertures 34 adapted to register with the apertures 13 provided in the rigid member 10. In addition, the plate 30 is provided with a forward extension 36 which extends below and surrounds the under surface of the rubber bumper 20. The assembled parts take the configuration illustrated in Fig. 4 and it will be observed that the supporting plate 30 has forced the lower surface of the rubber bumper body 20 up to the plane occupied by the lower surface of the rigid member 10, thereby compressing the rubber. Moreover, since the forward projection 36 of the plate 30 underlies the forwardly projecting portion of the rubber bumper body, it serves to support the same against downward thrust which can be anticipated as the result of children standing upon the projection portion of the rubber bumper. Plate 30 may be cored out as indicated at 37 to reduce cost and weight.

Obviously of course, the assembly employed in Figure 4 is used only when it is desired to elevate the rubber bumper body above the plane of the floor. In most installations the assembly comprises only the rigid member 10 and the rubber body 20 which are fastened directly. to. the, floor by screws passing. through the apertures 13.

The rigid member may be formed of metal, such for example-as brass or bronze, or other suitable metal, or it may be formed of other rigid or substantially rigid material, such for example as suitable plastics. The rigid member may be formed by any method suitable for the particular shape and material, such for example as stamping, forging, sand casting, die casting, powdered metal casting,and the like. In the same manner the bumper element of the invention may be formed of natural rubber, synthetic rubber, or other resilient material suitable to operate as a bumper in engagement with a door.

The drawing and the foregoing specification constitute adescription of the improved door stop in such full, concise and exact terms as to enable any person skilled in the art to practice the invention, the scope of which is indicated by the appended claims.

What I claim as my invention is:

-1. A door stop comprising an elongated rigid member provided with apertured ears at each end thereof and provided intermediate its ends with a downwardly and laterally open hollow half-dome portion, a rubber door bumper of generally half-dome shape so dimensioned that in the natural, uncompressed and undistorted condition of said bumper it will fit snugly within the hollow half-dome portion of said member, said bumper being disposed within the hollow half-dome portion of said member in surface to surface contacting relation therewith and completely filling the same, said bumper projecting laterally from the laterally open side thereof and having a downwardly extending portion dimensioned to extend below the open bottom of the hollow half-dome portion to compress the bumper when the member is drawn down tightly against a supporting surface, said hollow half-dome having an inwardly directed flange around its laterally open side, and said bumper having a groove therein in position to receive said flange.

2. A door stop as defined in claim '1 in which the bottom surface of said member is flat, and in which the bottom surface of the downwardly extending portion' of said bumper is also flat and parallel with the bottom surface of said member. g

3. A door stop comprising a rigid member having a hollow downwardly and laterally open portion and a flat bottom surface, means for securing said member'on a flat supporting surface, a rubber door bumper of a shape dimensioned to snugly fit within the hollow portion of said member in the natural, uncompressed and undistorted condition of said bumper, said bumper being disposed within the hollow'portion of said member in surface to surface contacting relation therewith and completely filling the same, said bumper projecting laterally from the laterally open side thereof and having a downwardly extending portion dimensioned to extend below the open bottom of the hollow portion of said member to compress the bumper when said member is drawn down tightly against a supporting surface, said hollow portion having aninwardly directed flange around the lateral opening, said bumper having a groove therein in which said flange is received, and the bottom surface of said downwardly extending portion being parallel to the flat bottom surface of said member.

4. A door stop comprising a rigid member having a hollow downwardly and laterally opening portion, means for securing said member on a supporting surface, a rubber door bumper of a shape dimensioned to snugly fit within the hollow portion of said rigid member in the natural uncompressed and undistorted condition of said bumper, said bumper being disposed Within the hollow portion of said rigid member in surface to surface contacting relation therewith and completely filling the same, said bumper projecting laterally from the laterally open side of said hollow portion and having a downwardly extending portion dimensioned to extend below the open bottom of the hollow portion of said rigid member to compress said bumper when said rigid member is drawn down tightly against a supporting surface, said hollow portion having an inwardly directed projection adjacent its laterally open side, and said bumper having a recess receiving said projection, thereby to resist forces tending .to separate said bumper from said rigid member.

5. A door stop as defined in claim 4 having a supporting plate for said rigid member and bumper shaped to completely underlie all portions of said rigid member and bumper, said plate being removably secured to said rigid member and having a thickness determined to space said bumper above a floor or other supporting surface a specified distance.

6. A door stop comprising a rigid member having a hollow downwardly and laterally open portion, means for securing said member on a supporting surface, a rubber door bumper member of a shape dimensioned to snugly fit within the hollow portion of said rigid memher in the natural uncompressed and undistorted condition of said bumper member, said bumper member being disposed within the hollow portion of said rigid member in surface to surfacecontacting relation therewith and completely filling the same, said bumper member projecting laterally from the laterally openside of said hollow portion and having a downwardly extending portion dimensioned to extend below the open bottom of the hollow portion of said rigid member to conr press said bumper member when said rigid member is drawn down tightly against a supporting surface, one of said members having a projection adjacent the laterally open side of said hollow portion and the other of said members having a recess receiving said projection, thereby to resist forces tending to separate said bumper member from said rigid member.

References Cited in the file of this patent UNITED STATES PATENTS 1,439,007 Ledwinka Dec. 19, 1922 2,040,986 Gignoux May 19, 1936 2,311,278 Johnson Feb. 16, 1943 

